Malicious PDF — malware analysis report

Static analysis result for SHA-256 c800137066d10f9c…

MALICIOUS

PDF

42.1 KB Created: 2021-05-12 21:04:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 31e2228ed18e873c8bbc8369291f2091 SHA-1: d8790c231f9bbc21c635010c1610aedd563433ee SHA-256: c800137066d10f9cfcb2842bfb2bb70eda7dd732290cb50860e72632b7277893
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/431946152/how-to-get-free-premium-roblox-game-hack PDF link annotation
    • http://perpustakaan.dutadharma.ac.id/repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/minecraft-apk-download-free-11-055_GM479516143.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/8bp-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/free-daily-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/free-minecraft-java-edition-codes_GM479516143.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/minecraft-free-reddit_GM479516143.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/how-can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/free-cracked-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/free-coin-master-gold-cards_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/microsoft-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AC0 23648 bytes
SHA-256: 31f6c71d55b76da48d6be78a4d5624fdfb46c96f8ad298a24d9133bca94dcafb
font_01_sfnt_off000080a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80A3 18888 bytes
SHA-256: b5a20fef57cf108902425c7fe9107080aaf47056a074752b6f70fc2176bbaa7e

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